What kind of welding rod is good for welding spiral welded steel pipe?

Welding rods with good corrosion resistance and mechanical strength should be selected for spiral welded steel pipe welding.

Commonly used types of welding rods:

1. Cobalt-based welding rod
Cobalt-based welding rods have excellent corrosion resistance and heat resistance, and can meet the needs of high quality and high durability of welds. Such as E312, E410 and E410NiMo, etc.

2. Stainless steel welding rod
Stainless steel welding rods have good corrosion resistance and mechanical strength, and are very effective in offshore use of spiral steel pipes. Such as E308, E308L, E309 and E316, etc.

3. Carbon steel welding rod

Carbon steel welding electrodes are suitable for welding low alloy steel and have good corrosion resistance and excellent processing performance. Commonly used ones include E7018 and E6010.

Welding rod selection principles:
1. Select welding rods according to steel pipe materials
For spiral steel pipes of different materials, corresponding welding rods should be selected. For example, for stainless steel spiral steel pipes, stainless steel welding rods should be selected to ensure the quality of the weld.

2. Select welding rods according to welding process
Different welding processes require different welding rods. For example, for manual arc welding, low-hydrogen welding electrodes should be selected to prevent pores in the weld.

3. Carbon steel welding rod
Carbon steel welding electrodes are suitable for welding low alloy steel and have good corrosion resistance and excellent processing performance. Commonly used ones include E7018 and E6010.

Welding rod selection principles:
1. Select welding rods according to steel pipe materials
For spiral steel pipes of different materials, corresponding welding rods should be selected. For example, for stainless steel spiral steel pipes, stainless steel welding rods should be selected to ensure the quality of the weld.

2. Select welding rods according to welding process
Different welding processes require different welding rods. For example, for manual arc welding, low-hydrogen welding electrodes should be selected to prevent pores in the weld.

3. Select welding rods according to weld performance
When welding, different electrodes should be selected according to the performance of the weld. If the weld strength is required, a high-strength welding rod should be selected; if corrosion resistance is required, a welding rod with good corrosion resistance should be selected.

Precautions:
1. Before use, check whether the quality of the welding rod is qualified and use it in accordance with the welding specifications.
2. When welding, parameters such as current, voltage, and welding speed should be strictly controlled to avoid affecting the quality of the weld.
3. Before welding, prepare the steel pipe to ensure that the surface is clean and free of rust and oil.

Conclusion:

In the welding process of spiral welded steel pipes, it is very important to correctly select the appropriate welding rod. Cobalt-based welding rods, stainless steel welding rods and carbon steel electric welding rods are all commonly used types of welding rods. The appropriate welding rod should be selected based on factors such as steel pipe material, welding process and weld performance. When welding, attention should be paid to controlling the welding parameters and preparation work to ensure the quality of the weld.

Go here to learn more: Carbon steel vs Stainless steel